DocumentCode :
3383575
Title :
An exact, high-efficiency PFM DC-DC boost converter with dynamic stored energy
Author :
Chen, Hou-Ming ; Chang, Robert C. ; Lei, Pui-Sun
Author_Institution :
Dept. of Electr. Eng., Nat. Chung-Hsing Univ., Taichung
fYear :
2008
fDate :
Aug. 31 2008-Sept. 3 2008
Firstpage :
622
Lastpage :
625
Abstract :
This paper presents an exact and high-efficiency PFM dc-dc boost converter designed with a standard TSMC 3.3/5 V 0.35-mum CMOS technology. The proposed boost converter utilizes a dynamic stored energy technique to reduce output voltage variation and raise power conversion efficiency. This result is realized using a dynamic stored energy controller and a load current detector that accurately generates different energy according to various load conditions. The output up-ripple voltage variation and steady-state accuracy was 2.6 mV (5.7 mV-8.3 mV) and 0.15% whereas its fixed energy counterpart was 11.1 mV (8.1 mV-19.2 mV) and 0.35%, respectively. The proposed circuit has 6.91% higher power-conversion efficiency than conventional fixed energy technique at a 1 mA current. The maximum power-conversion efficiency is 91.75% for 50 mA output current with a 1.5 V supply.
Keywords :
CMOS integrated circuits; DC-DC power convertors; CMOS technology; PFM DC-DC boost converter; current 1 mA; current 50 mA; dynamic stored energy; load current detector; power conversion efficiency; pulse frequency modulation; size 0.35 mum; standard TSMC; voltage 1.5 V; voltage 2.6 mV; voltage 3.3 V; voltage 5 V; voltage 5.7 mV to 8.3 mV; voltage 8.1 mV to 19.2 mV; Batteries; CMOS technology; Circuits; Current supplies; DC-DC power converters; Low voltage; Personal digital assistants; Pulse width modulation; Switches; Switching loss;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electronics, Circuits and Systems, 2008. ICECS 2008. 15th IEEE International Conference on
Conference_Location :
St. Julien´s
Print_ISBN :
978-1-4244-2181-7
Electronic_ISBN :
978-1-4244-2182-4
Type :
conf
DOI :
10.1109/ICECS.2008.4674930
Filename :
4674930
Link To Document :
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